Ratchet-drill.



C. B. GHOFF.

RATCHET DRILL. APPLICATION FILED FEB.25, 1908. RENEWED DEC. 11,1916.

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C. B. GROFF.

RATCHET DRILL. APPLICATION FILED FEB. 25| 190B- RENEWED DEC. H 1916.

Patented July 17, 1917.

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CLARENCE B. GROFF, 0F CAMIDEN, NEW JERSEY.

RATCHET-DRILL.

Application filed February 25,V 1908, Serial No. 417,712. Renewed December 11, 1916.

To all whom it may concern:

Be it known that I, CLARENCE B. Gnorr, a citizen of the United States, residing in the city and county of Camden, State of New Jersey, have invented a new andV useful Ratchet-Drill, of which the following is a specification.

My present invention consists of a novel construction of a ratchet drill.

1t further consists of other novel features of construction all as will be hereinafter fully set forth.

For the purpose of illustrating my invention, 1 have shown in the accompanying drawings a preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, and my invention is not limited to the precise arrangement and organization of these instrumentalities as herein set forth, except by the scope of the appended Claims.

Figure 1 representsa sectional elevation of a ratchet drill embodying my invention.

Fig. 2 represents a sectional plan view on line 1i-a, Fig. 1.

Fig. 3 represents a sectional plan view on line 5 7), Fig. 1.

Fig. 4 represents a sectional plan view on line che, Fig. 1.

Fig. 5 represents a sectional line cil-d, Fig. 1.

Fig. 6 represents a sectional plan view on line c-c, Fig. 1.

Fig. 7 represents a sectional plan view on line f-f, Fig. 1.

Fig. S represents a sectional plan view on line g-g, Fig. l.

Fig. 9 represents a partial sectional elevation of Fig. 1, showing end vsuited for attaching to a regular type of old man by the use of a clamp or similar means.

Fi 10 represents a sectional plan view on line Zie-h, Fig. 9.

Fig. 11 represents a plan of the ring nut.

Similar numerals of reference indicate corresponding parts in the figures.

Referring to the drawings:

1 designates a crank with which a sleeve nut 2 is in preferably threaded and pinned engagement, said sleeve being rotatably and ahuttingly seated in sleeve 3.

plan view on Specification of Letters `Patent.

Patented July 17, 1917.

Serial No. 136,373.

4 designates lugs on the sleeve 3 which engage in keyways 5 seated in sleeve 6.

7 designates flats on sleeve 3 for preventing rotation of said sleeve 3.

136 designates a recess in the end of the sleeve 3 for receiving the shoulder 8 on sleeve nut 2.

9 designates a collar on sleeve 3.

l0 designates a spring in abutment with collar 9 for taking the thrust of the drill.

11 designates a feed screw provided with a friction band 12.

13 designates recesses for springs 14 and l5 which actuate radial ratchet teeth 30 and 34.

16 designates a hardened steel center in engagement with feed screw 11.

17 designates a shoulder on feed screw 11 for holding parts in working position.

18 designates a ring nut surrounding sleeve 3 and in threaded engagement with casing 19.

20 designates keyways fin ring nut 18 to permit passing ring nut over lugs on sleeve 3.

21 designates a filling of white metal or similar material for closing lreyways 20 t0 prevent the entrance of sand or other material into the mechanism of the device.

22 designates the curved part of the keyways for holding the filling 21 in place.

23 designates a ring in threaded engagement with sleeve 6.

24 designates a hole in ring 23 for feed screw 11.

25 designates radial ratchet teeth on the 'face of ring 23.

26 designates a ring provided with lugs 27 seated in keyways 28 in casing 19.

29 designates a recess for spring 14.

30 designates radial ratchet teeth on the face of ring 26.

31 designates a hole in ring 26 foi1 feed screw 11.

32 designates a ring provided with lugs 33 seated in lreyways 23 in casing 19.

34 designates radial ratchet teeth on the face of ring 32.

35 designates a hole in lring 32 for drill socket 36.

37 designates a recess for spring 15.

Y 33 designates a ring in threaded engagement with drill socket 36 and rotatably mounted in casing 19.

39 designates radial ratchet teeth on the face of ring 38. v

40 designates gear teeth on drill socket 36. 41 designates a recess for the drill or other working tool.

lgear 47.

52 designates teeth of internal gear which engage the teeth 53 of' the pinions54 which yare'rotatably mounted on pins 55 in casing 19.V

56 ldesignates an oil hole for lubricating .device and extends any desired distance into or through handle and provided with suit- A able closing device.

- 57 designates a ring nut adjustably mounted on casing 19 for holding .the internal gear in assembledA position.

i3-designates an adjusting ring rotatably 'f mountedon casing 19, provided with shoulders 59 andv 60 to limit travel of' ring.

61 designates threaded part of adjusting member 58. 62- designates inclined' friction face on said` member.

f '63 designates threads von casing 19".y 64,designates gibs provided with inclined faces 65 in abutment with inclined friction facev62 and yielding means 66, which inthe present instance is integral`r with the gib. 64

although av separate spring may be em- Y ployed; if desired.v

67.1 designates friction gibs seated.- in slots 68 locatedin casing 19,` said friction gibs being-in ffrictional engagement with the friction band 12 on the feed screw 11.

90' designates a hardened steel center, Fig. 9, provided with a shoulder 91 abutting against sleevek 92, saidfsleeve 92 being similar to sleeve 3'-, Fig. 1, except as shown by Figs. 9vand=1=0L 93 designates a sleeve nut, which is similarto the sleeve nutV 2, Fig. 1f, exceptk as Y shown by Fig.- 9and Fig. 10.-

94 designatesopenngs in sleeve 92 to permit' rotatingffof the sleeve nut 93 bymeans of a spud 95 orA other device inserted alternatelyinholes 96, 97, 98 and 99.

g By rotating sleeve nut 93, the drill` 43 is adjusted to or removed from its work, as will be hereinafter fully described.

Y After the thrust on the drill has been removed by the spud or other device, the openings 94 are so designed as to permit the operator to rapidly adjust the drill with his fingers..

100 designates a plugin preferably threaded and pinned engagement with sleeve nut 93.

101 designates a shoulder on plug 100 for holding sleeve nut 93 in assembled position.

102 designates ilatted sides of the upper endv of Sleeve 92 for preventing the rotation of sleeve 92 when inserted in clamp 103 or other device.

Figs. 9 and 10 are shown to indicate that the ratchet drill is thoroughly adapted for drilling with the conventional style of old man by a slight V1change in design, but with no change in principle, as it will be readily'seen that the spud 95' takes the place of crank 1, Fig. 1, in rotating sleeve nut 93 vand that by being left in place as shown, prevents sleeve 93' from rotating during the drilling operation, also that hardened steel ,centery transmits the thrust of the drill to sleeve 92' as does spring 10', Fig. 1, to the similar sleeve 3.

Itis to be understood, however, that the rotating and locking of sleeve nut 93 may be accomplished by any suitable means.

rEhe operation of my novel construction of ratchet mechanism can now be readily understood and is as follows:

Referring now to. Figs. l to S, inclusive, it will be` seen that the iiatted end 7 of the sleeve 3 isplaced' in a suitable recess capable off preventing said sleeve 3 from rotating during the drillingfoperation.

The drilll 43' is advanced to its work by the rotation of the sleeve nut 2 enveloping the feed' screw 11. When the point of the drill 43 comes in contact withthe work, the sleeve nut 2 and sleeve 3 continue to move outwardly and press against the end of the drilling clamp through the medium of the collar. 9 and spring 10 or by means of the hardened steel1 center 90, see Fig. 9, in the end of sleeve 92 against the drilling post or other suitable device. Y

The rotation of the sleeve` 2 is accomplished by the operator by means of the crank 1spud, 95 or by the lingers of the operator acting directly on the `sleeve nut 2,

it; having been found in practice that the sleeve nut 2V may be rapidly turned by the fingers of the operator until the device is in drilling position.

It will beseen that when the point of the drill: 43 and th-e sleeve 3 are in abutment with the work and the end of the drilling clamp or other device, the friction between the threads of the sleeve nut 2 and the feed screw 11` will' increasewithk the rotation of the sleeve nut 2, until it will be difficult to turn the sleeve nut 2 with. the lingers, spud or other device. Unless the drill 43 is rotated 1,233,344 1;? lll;

and actual cutting accomplished, only a few turns of the sleeve nut 2 can be made, depending on the rigidity of the spring 10, or other means. After the parts mentioned reach their yielding limit further turning of the sleeve nut 2 is practically impossible until the drill 43 cuts away a portion of the work, then the sleeve nut 2 can be readily rotated. The drilling thrust on the sleeve 3 is transmitted from the sleeve 3 to sleeve nut 2, and to the feed screw 11, which abuts against the hardened steel center 46 seated in the upper end of the drill socket 36, which in turn transmits the drilling pressure to the drill 43.

It will be seen from the construction that the heavy thrust or pressure required for drilling is transmitted through parts of great strength and does not place the entire body of the device under the drilling thrust, thereby adding to the wearing quality of the device.

The tool having been placed in working position as described and the sleeve nut 2 rotated until it is difficult to turn, and the crank 1, spud 95 or other means secured in place as shown in Figs. 1, 9 and 10, to prevent the rotation of the sleeve nut 2, the handle 48 is moved preferably opposite to the direction of the arrow, Fig. 7, as it is during this motion that my feed is applied to the drill.

The sleeve nut 2 being secured from rotation as described, it is evident that to cause an increase and continuation of the drilling thrust, the feed screw 11 must be rotated in the proper direction which in this tool is opposite to the direction of the arrow seen in Fig. 7. rllhe direction of rotation of the feed screw 11 is governed by the direction of the turning motion of the drill 43 which in the construction shown is in the conventional or right hand direction. A drill rotating in the opposite direction will be automatically fed to the work during the motion of the handle 48 in the direction of the arrow, seen in Fig. 7, it then being essential only to cut the radial ratchet teeth opposite to those shown in the drawings, thereby causing the drill to rotateI opposite to the conventional direction.

When the handle 48 is moved opposite to the direction of the arrow in Fig. 7, the drill socket 36 is actuated through the internal gear 47 and pinions 54 in the direction of the arrow, Fig. 7, as will be readily seen by an inspection of Fig. 7.

The drill socket 36 is prevented from rotating in this direction by suitable ratchet teeth 39 seated in ring 38 in threaded engagement with the drill socket 36 in conjunction with spring 15, and suitable radial ratchet teeth 34 seated in ring 32 which is confined to relative movement with respect to the casing 19 by lugs 33 seated in keyways 28 in casing 19.

novel automatic friction It will be seen that by the interlocking of the radial ratchet teeth 34 and 39 by the action of spring 15, the drill socket 36 is confined to relative motion with the casing 19 by the lugs 32 seated in key-ways 28 in casing 19, thereby locking the pinions 54 and internal gear 47 and causing the parts mentioned, when the handle 48 is moved opposite to the direction of the arrow, to move in unison around the sleeve G, which latter is held from rotation by the lugs 4 on the sleeve 3, which are seated in key-ways 5 in the sleeve G.

The radial ratchet teeth 25 and 30 during this motion of the handle 48 ride over each other, being suitably made to interlock by the action of spring 14 only when the handle 48 is moved in the direction of the arrow in Fig. 7. i I

During the motion of the handle 48 opposite to the direction of the arrow in Fig. 7,

the feed screw 1l is rotated by the friction gibs 67 carried by the casing 19, gripping the friction band 12 of the feed screw 11, thereby causing the feed screw 11 to rotate in unison with the casing 19, which rotation causes linear movement between the sleeve nut 2, abutting sleeve 3 and feed screw 11, thereby transmitting the drillthrust to the drill 43. The rotation of feed screw V11 continues to be in unison with casing 19 until the friction between the threads of the feed screw 11 and sleeve nut 2 becomes greater than the frictional contact between the friction gibs G7 and the friction band 12 on the feed screw 11. `When such condition exists the feedk screw 11 ceases to rotate in unison with casing 19 until the rotation of drill 43 cuts away sufficient material to permit the drill to advance, which advance decreases the drilling thrust, thereby causing the friction between the threads of the feed screw 11 and sleeve nut 2 to become less than the frictional contact between friction gibs 67 andfriction band 12 on the feed screw 11.

The feed screw 11 then rotates as before described and continues the drilling thrust automatically. l

It has been found in practice that the novel feeding means shown causes the drill to make a long chip of even thickness which indicates that the reduction of friction between the threads of the feed screw 11 and sleeve nut 2, causes the automatic feed to rotate the feed screw 11 at proper intervals, otherwise the chip would be of uneven thickness, and the resistance of the handle 48 would vary to such an extent as to greatly fatigue the operator.

In practice it has been found that the pull on the handle 48 when using my novel automatic friction feed, never varies perceptibly.

1n drilling steel rails, hard spots in the center of the web of the rail are often encountered, which without my automatic friction feed would cause a broken drill or a great overload on the operator, Many tests have proven that my automatic friction feed immediately causes the drill to take a thinner Chip, while passing through a hard spot and automatically increases the thickness, as soon as the hard spot is pierced and the drill 43 enters the softer part of the rail or other work.

It heilig readily seen that the striking of a hard spot at once increases the drilling thrust required, assuming the same thickness of chip `be continued, this increase of thrust causes the friction between the Vthreads of the feed screw 11 and sleeve nut 2 to. become greater than the frictional contact between the friction gibs 67 and friction band 12 on the feed screw 11, thereby causing feed screw 11 to cease rotating` until the thickness of the chip decreases to a point where the normal drilling thrust will cause the drill to cut.

By the proper adjustment of Listing ring 58 any desired resistance to the motion .of the handle 48 may be obtained.

VvThe rotation of the adjusting nut 5 8 about Vthe casing 19 in one direction ,ca-uses the eoned face 62 to advance on the inclined Vfriction faces of the gibs 64 1causing the vgibs 64 and yielding means 66 to abut against friction gibs 67.

It will now be clearly seen that the pressure on friction band 12 on the feed screw llfmay be increased at the will of the operator and that the reverse rotation of the adjusting ring 58 about the casing 19 will decrease the pressure on the friction band 12 Yand by such change of pressure vary the to the strength of the operator.

This ability to vary the amount of feed has been found in practice to .be of great utility, some operators working to the best advantage with `a slow motion of the handle v48v and a thick chip, while men of lighter build obtain the best -results with a quick motion of the handle 48 and a lthinner chip.

Having described my novel automatic Afeeding means and one motion of the drill,

' the following will show how the drill is continued tol actuate in the cutting direction when the handle 48 is moved in the direction of the arrow in Fig. v7 which, as will be noted is opposite to the cutting direction of the drill 43. Y

AsA before described, the sleeve ,3 and `sleeve v6 cannot. move relatively to each other. In the lower end of the sleeve 6 is seated the radial ratchet teeth 25 suitably cut vto interlock by the action of spring 14 with the radial ratchet teeth 30 seated in ring 26 which is confined to relative motion with the casing 19 by the lugs 27 seated the key-ways 28 in the casing 19. It will now be seen that the moving of the handle 48 in the direction of the arrow tends to carry the casing 19 in the same direction. This tendency causes the radial ratchet teeth 25 and 30 to interlock, which in conjunction with lugs 27, sleeve G and sleeve 3 causes the casing 19 to remain stationary during the motion of the handle 48 in the direction of the arrow, Fig. 7, thereby forming a rigid base for the pinions 54 which, actuated by the internal gear 47 traveling in unison with the handle 48 in the direction of the arrow, Fig. 7, drive the drill socket 3G in the cutting direction as will be seen by an inspection of Fig. 7.

It will now be apparent that a continuation of the reciprocating motion of the handle 48 will give a substantially continuous cutting motion to the drill 43 it being, of course, understood that there is only a momentary cessation in the continuous cutting movement of the drill at each end of the reciprocating motion of the handle but to all practical purposes continuous cutting motion of the drill is produced.

It is to be understood that the feed screw l1 shown in my novel automatic feed may be actuated by any means that will cause it to rotate when the friction between the threads of the feed screw 11 and sleeve nut 2 has been reduced to a proper degree by .the drill cutting away the work.

And furthermore, the yielding means G6 ing cheaper to make but has to be adjusted 'l' more frequently than when fitted with yielding means 66.

The novel device for holding the drill 43 in position and taking the torsional twist during the drilling operation is, by its construction, particularly adapted for quick changing of drills and prevents the buiring and breaking of the set screw. i In prior constructions with which I am familiar which use a set screw for holding a straight shanked drill with latted end, the set screw abuts against the flatted end and receives the torsional load due to drilling. In practice this load causes the end of the set screw to bur and break, also the set screw is often twisted olf by the operator screwing it up too hard, thus necessitating taking the drill or other machine to the shop to have the set screw drilled out, thereby causing delay and loss of time.

In my novel construction, at the inner end of the recess 41, a flat face 42 is provided suitable for receiving the fiatted end of drill 43. It will be seen that since the flat face 42 is integral with the drill socket 36, the strongest possible means is obtained to receive the torsional load due to drilling and that the only work for the set screw 44 to do is to prevent the drill 43 from withdrawing from the drill socket 36 when the tool is removed from the work; to do this it is only necessary to tighten the set screw 44 with the ngers, thus avoiding the danger of breaking the set screw 44 by improperly using a wrench. In this construction the drill may be readily removed when the set screw 44 has been loosened by the fingers of the operator.

By the novel construction of sleeve nut 2 enveloping feed screw 11, the advancing in either direction of the drill 43 is accomplished without interfering with the automatic friction feed, it being seen thatl the friction grip on the friction band 12 on the feed screw 11 holds the feed screw stationary eXcept when rotated in unison with casing 19, as before described, and that the rotation of sleeve nut 2 by means of crank 1 or other device about the feed screw 11, which latter is held from rotating as before described, causes linear motion between the feed screw 11 and sleeve nut 2 thereby advancing drill 43 to or from the work at the will of the operator.

By the construction described a more rapid adjustment of drill 43 is permitted than is possible with any prior construction, which is of great importance when it is understood that from four hundred to five hundred holes per day are drilled for rail bonding purposes with a single machine, constructed in accordance with my novel ratchet drill, which is not possible unless a very rapid adjustment is provided, as in the present case. Without my novel means of adjustment the number of holes drilled would not exceed two hundred, which shows the great practical value of my novel, quick adjustment and automatic feeding means.

I wish to direct special attention to my,

novel means of protecting the feed screw 1l from the action of sand and grit or injury to the threads from a blow or other source.

As will be readily seen the feed screw 11 is enveloped by sleeve nut 2 sealed at its outer end by any suitable means, and that sleeve n ut 2 is seated in and enveloped by the sleeve 3 which, in conjunction with sleeve nut 2, advances in and out of the sleeve 6 when the sleeve nut 2 is rotated about the feed screw 11 as before described. By this novel construction the feed screw 11 is entirely protected from sand and grit or injury, and is surrounded by an oil bath, thereby giving -much better service.y The sleeve ,3 being surM rounded by the ring nut 18, and the openings for passing the ring nut 18 over lugs 4 being sealed with suitable material, the inward and outward movement of the sleeve 3 is accomplished without carrying sand or grit into the working parts of the machine, such action being prevented by the enveloping ring nut 18 or other suitable means.V

It has been found in practice that the radial ratohets 34 and 39 and integral parts can be omitted with the result that drill 43 stands still during the motion of the handle 48 opposite to the direction of the arrow in F ig. 7, giving an entirely free motion in this direction with the exception of the power required to apply the automatic friction feed. During the motion of the handle in the direction of the arrow in Fig. 7, the drill 43 rotates continuously at a speed de pending on the ratio of the gearing.

By inspection it will be seen that the` omitting of the radial ratchets 34 and 39 and integral parts, permits the casing 19, pinions 54, internal gear 47 and handle 48 to rotate in unison about the drill socket 43 and sleeve G, as the lugs Vholding casing 19 in relative movement with drill socket 36 through radial ratchets 34 and 39 are omitted. There is then no locking connection between drill socket 43 and casing 19; the only tendency to rotate the drill socket 43 being the friction between the gear teeth which is easily overcome by the friction between the point of the drill 43 and the work. It will be seen that I employ a stationary rotatable thrust bearing in threaded engagement with the feed screw. I employ what can be termed afriction clutch.

It will now be apparent to those skilled in this art that I have devised a novel and useful construction of ratchet drill which embodies the features of advantage enumerated as desirable in the statement of invention and the above description, and while I have in the present instance shown and described the preferred embodiments thereof which have been found in practice to give sat-isfactory and reliable results, it is to be understood that it is susceptible of modification in various particulars within the scope of the claims without departing from the spirit and scope of the invention or sacrificing any of its advantages.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a ratchet drill, a friction feed in which the feed is intermit-tingly operative during the rotation of the drill and including a feed screw and means in operative engagement with said feed screw for adjusting the drill to its work without actuating said friction feed or rotating the feed screw.

2. In a ratchet drill, a feed screw, a friction feed applied directly theretov and interm'ittingly operative to cause a feeding move'- ment of vthe drill, and means including a sleeve 11i threaded engagement withA said feed screw for adjusting the drill to itsy work wit-hout actuating the friction feed or rotating theV feed screw or the working tool.

3. In a ratchet drill, a easing, a feed screw therein, adjustable means carried by said casing for producing an automatic and intermittent friction feed of said feed screw, and meansin'tl'ireaded engagement with said feedl screw for longitudinally adjusting the drill' to the work without affecting the adjustment of said friction feed or rotating the drill. j

4L. Inv a ratchet drill`,'a casing, a feedi screw therein having ak friction band near its forward end, gibs adapted to engagel said band,

means adjustably carried by said casing for varying the strength of such engagement, a' feed' nut, actuating means therefor, a drill socket carried' by the casing and in alinem'ent with said feedl screw, and actuating means for said socket.

5.v In a ratchet drill, a casing, a sleeve therein having longitudinally extending keyways, a second'. sleeve having lugs adapted to engage said key-ways, a sleeve nut loosely mounted' in said` second sleevefa lfeed* screw having threaded engagement with said sleeve nut, a crank secured to said sleeve nut,an adjustableJ friction feed co-acting with said feed screw near its forward end, a drill socket carried by the casing and to Vwhichlzthe` thrust of said feed screw is impartedi, andv actuating'means for said drill socket.

6. In a ratchet drill, a casing, a sleeve therein having longitudinally extending key-ways, a secondiy sleeve having lugs adaptedto engage said; key-ways and provided withv a shoulder, a sleeve nut loosely mounted within said second sleeve, a feed screw engaging' said sleeve nut, yielding means engaging said shoulder for taking up the thrust of thev drill, a crank secured to said sleeve nut, an automatic friction feed coactin'g with said feed screw, a drill socket `carried byv saidi casing and to which the thrust of said feedl screw is imparted, and` actuating means for said drill socket.

7. In a" ratchet drill, a casing, va sleeve loosely mounted therein having key-ways, a second' sleeve having lugs adapted to engage said key-ways, a ring nut engaging the outer end of said first sleeve and secured to' said casing, a filling'y material secured bee tween said* ring nut and said second sleeve, a sleeve nut mounted within said second sleeve, a 'crank therefor, a friction feed including 'a feed' screw engaging lsaid sleeve nut, a drill socket lcarried by said casing and to which the. thrust of saidt feed screw isA imparted, and actuating means for'gsaid drill socket.

S'. In a ratchetk drill', a' casing, a sleeve mounted therein having key-ways, a second sleeve having lugs engaging said key-ways, a ring nut engaging said casing and abutting against said first sleeve and having its inner periphery curved, filling material secured to said periphery for closing the ends of said key-ways, a sleeve nut loosely mounted in said second sleeve, a friction feed including a feed screw engaging said sleeve nut, a crank for said sleeve nut, a drill socket carried by said casing and to which the thrust of said screw is imparted, and means for rotating said drill socket.

9. In a ratchet drill, a casing, a sleeve loosely mounted therein having key-ways, a second sleeve having lugs engaging said keyways, a ring nut engaging said casing and first sleeve, a sleeve nut mounted within said second sleeve, a crank therefor, a feed screw engaging said sleeve nut, a ring having threaded engagement with said first sleeve and provided with radial ratchet teeth on its forward end, a ring having ratchet teeth adapted to co-act with the ratchet teeth of said ring nut, said ring being non-rotatably carried by the casing but longitudinally movable relative thereto, yielding means for maintaining said ring and ring nut in operative relation, a drill socket mounted in said casing, a ring nut secured thereto having radial ratchet teeth, a ring having radial ratchet teeth coacting therewith, yielding means for maintaining said last named ring nut and ring in operative relation, a pinion carried by said casing adapted to rotate said spindle, a gear rotatably mounted on said casing for driving said pinion, and actuating means for said gear.

l0. In a ratchet drill, a drill socket, a feed screw therefor, a friction feed directly applied to said feed screw, intermittently operative during the rotation of the drill socket to cause longitudinal movement of the latter, actuating means for said drill socket., and means including a sleeve in threaded engagement with said feed screw for longitudinally adjusting the drill without aileeting the friction feed or rotating the drill socket.

11.y Inv a ratchet drill, a casing, a sleeve mounted therein having key-ways, a second sleeve having lugs engaging said key-ways, means carried by said casing for preventing foreign materials enteringl said key-ways, a'sleeve nut loosely mounted in said second sleeve, a crank therefor, a feed screw engaging said sleeve nut, a drill socket carried b v the casing and in alinement with said feed screw, actn'ating means for said drill socket, a friction band carried by said feed screw, friction gibs engaging said band, an adj nstable ring rotatably carried by said casing, and friction means actuated thereby and col acting with said friction gibs.

1Q. In a ratchet drill, a casing, a sleeve ino-unted therein having key-ways, 'a second sleeve having` lugs engaging said key-ways, means carried by said casing for preventing foreign material entering said key-ways, a sleeve nut loosely mounted in said second sleeve, a crank therefor, a feed screw engaging said sleeve nut, a drill socket carried by the casing and in alinement with said feed screw, actuating means for said socket, a friction band, friction gibs engaging said band, a ring having threaded engagement with said casing and provided with an inclined friction face, friction gibs having inclined faces co-acting with the inclined face of said ring, and yielding means between said ring and said first mentioned friction gibs.

13. In a ratchet drill, a casing, a sleeve loosely mounted therein, an apertured `ring nut secured to said sleeve and having radial ratchet teeth on its forward end, a second sleeve having longitudinal movement with respect to said first sleeve, a sleeve nut mounted in said second sleeve, a crank therefor, a feed screw engaging said sleeve nut and having a friction band, friction gibs loosely mounted in said casing and engaging said friction band, friction gibs having l yielding means engaging said first friction gibs, a ring rotatably carried by said casing and engaging said second friction gibs, a drill socket carried by the casing, a hardened centertherein, a hardened center carried by said feed screw engaging said rst center, and means for effecting the rotation in a single direction of said drill socket.

14. In a ratchet drill, a casing, a sleeve mounted therein having key-ways, a second sleeve having lugs engaging said key-ways, a ring nut carried by the outer end of said casing and having key ways, means carried by said ring nut for closing the ring nut, key-ways, a sleeve nut mounted in said second sleeve, a crank therefor, a feed screw engaging said sleeve nut, a drill socket carried by the casing and to which the thrust of said feed screw is imparted, a friction feed for said feed screw, actuating means for said drill socket, and yieldingl means carried by said second sleeve for taking up the thrust of the drill.

15. ln a ratchet drill, a casing, a sleeve loosely mounted therein and having keyways, a second sleeve having lugs engaging said key-ways, a ring nut having radial ratchet teeth on its forward end and carried by said first sleeve, a sleeve nut carried by said second sleeve, means for rotating said sleeve nut, a feed screw having threaded engagement with said sleeve nut, a ring mounted on said feed screw, a ring having longitudinal movement with respect to said casing and provided with radial ratchet teeth co-acting with theratchet teeth of the ring nut carried by said sleeve, yielding means for maintaining said teeth in operative relation, a drill socket, a ring' nut on said drill socket carried by the casing, said ring nut having radial ratchet teeth on its inner end, a ring having longitudinal movement with respect to said casing and provided with ratchet teeth co-acting with the ratchet teeth of said last named ring nut, yielding means for maintaining said last named teeth in operative relation, an automatic friction feed for said feed screw, and driving means co-acting with the gear on said drill socket.

16. In a ratchet drill, a casing, a sleeve loosely mounted therein and having keyways, a second sleeve having lugs engaging said key-ways, a ring nut having radial ratchet teeth on its forward end and carried by said first sleeve, a sleeve nut carried by said second sleeve, means for rotating said sleeve nut, a feed screw having threaded engagement with said sleeve nut, a ring inounted on said feed screw, having longitudinal movement with respect to said casing and provided with radial ratchet teeth co-acting with the ratchet teeth of the ring nut carried by said sleeve, yielding means for maintaining said teeth in operative relation, a drill socket carried by said casing and having gear teeth, a ring nut on said drill socket and having radial ratchet teeth on its inner end, a ring having longitudinal movement with respect to said casing and provided with ratchet teeth co-acting with the ratchet teeth of said last named ring nut, yielding means for maintaining said last named teeth in operative relation, actuating means for said feed screw, and driving means eo-acting with the gear on said drill socket.

17. In a ratchet drill, a casing, a sleeve loosely mounted therein and having keyways, a second sleeve having lugs engaging said key-ways, a ring nut having radial ratchet teeth on its forward end and carried i by said first sleeve, a sleeve nut carried by said second sleeve, means for rotating said sleeve nut, a .feed screw having threaded engagement with said sleeve nut, a ring mounted on said feed screw, having' longitudinal movement with respect to said casing and provided with radial ratchet teeth co-acting with the ratchet teeth of the ring nut carried by said sleeve, yielding means for maintaining said teeth in operative relation, a drill socket carried by the casing and having gear teeth, a ring nut on said drill socket and having radial teeth on its inner end., a ring having longitudinal movement with respect to said casing and provided with ratchet teeth co-acting with the ratchet teeth of said last named ring nut, yielding means for maintaining said last named teeth in operative relation, actuating means for said feed screw, pinions carried by said casing and co-acting with said vgear teeth, an internal gear carried by said casing for driving said pinions, and a handle secured to said gear.

18. In a ratchet drill, a casing, a sleeve loosely mounted therein and having keyways, 'a :second sleeve having lugs engaging sa-id key-ways, a ring nut having radial ratchet teeth on its forward end and carried by said first sleeve, a sleeve nut lcarried by said second-sleeve, means for rotating said sleeve nut, a feed screw having threaded engagement with said sleeve nut, a ring mounted on said feed screw, having longitudinal movement with respect to said casing and provided with radial ratchet teeth co-actiiig with the ratchet teeth of the-ring nut ca-rried by said sleeve, yielding means for maintaining said teeth in operative relation, a drill socket having gear teeth, a ring nut on saiddrill socket carried by the casing and having radial ratchet teeth on its inner end, a ring having longitudinal -movement with respect to said casing and provided with Vratchet 'teeth co-acting with the ratchet teeth of said last named ring nut, yielding means for maintaining said last named teeth -in operative relation, actuating means for said feed screw, pinions carried by said cas-ing co-actin'g with the gear teeth, an internal gear car-ried by said casing for driving said pinions, and a handle secured to said gear having a passage for lubricating Vmaterial leading to said pinions.

19. In a ratchet drill, a casing, a sleeve therein having key-ways, a second sleeve having lugs engaging the key-ways of said iirst sleeve and provided with a recess at its forward end, a sleeve nut loosely mounted in said second sleeve and having an enlargement engaging said recess, an actuating handle for said sleeve nut, afeed screw engaging said sleeve nut, a ring nut carried by the outer end of said casing and engaging said first sleeve, a ring nut secured to the inner end of said first sleeve and provided with -radial ratchet teeth on its forward end, a ring having lugs engaging the key-ways of said casing and provided with y Vradial ratchet teeth, a friction band at the inner end of said feed screw, a spring interposed between said friction band and said ring, a drill socket carried by the casing and having teeth thereon, a ring nut carried by `T-said drill socket and having radial teeth on its inner end, a second ring having lugs engaging the key-ways of said casing and provided with ratchet teeth co-.acting with the ratchet teeth of said second ring nut, a

-spring interposed between said friction band 20. In a ratchet drill, a casing, a sleeve having key-ways therein, a second sleeve having lugs engaging said key-ways and provided with a shoulder, a sleeve nut mounted within said second sleeve, a crank secured at the outer end vof said sleeve nut, a feed screw engaging said feed nut, a drill socket carried by the casing and to which the thrust of said feed screw is imparted, lactuating means for said socket, a friction feed for said feed screw, and yielding means out of engagement with the feed screw and mounted on said second sleeve between said crank and said shoulder.

21. In a ratchet drill, a feed screw, a drill socket, an automatic yieldingly actuated friction feed engaging directly with said feed screw, a drill socket fed thereby, actuating means for said drill socket, said feed screw being adapted to rotate at a different speed from said drill socket, and means in direct engagement with said feed screw for adjusting the drill to its work without actuating said' friction feed or rotating the drill.

22. In a drilling apparatus, a friction feed operative during the rotation of the drill, and including a feed screw operated by the friction feed, and means for returning said feed screw to position without rotating the same.

23. In a drilling appa atus, a friction feed operative during the rotation of the drill, and including a feed screw operated by said friction feed, and va stationary rotatable thrust bearing in threaded engagement with said feed screw for advancing and returning said feed screw without rotating the same.

211. In a drilling apparatus, a friction feed operative during the rotation of the drill, and including a feed screw operated by said friction feed, and a casing completely inclosing said feed screw in all of its positions.

25. In a drilling apparatus, va frame, a feed screw therein having va friction band near its forward end, gibs adapted to engage said band, resilient means for exerting pressure on said gibs, a drill socket carried by the frame and in alinement with said feed screw and operatively connected therewith, and actuating means for said socket.

26. In a drilling apparatus, a frame, a feed screw therein having a friction band near its forward end, gibs adapted to engage said band, means adjustably carried by said frame for varying the strength of such engagement, a drill socket carried by the frame and in alinement with said feed screw and operatively connected therewith, andactuating means for said socket.

27. In a drilling apparatus, a friction feed operative during the rotation of the drill, and including a feed screw operated by said friction feed, a stationary rotatable thrust bearing in threaded engagement With said feed screw, and means for rotating said thrust bearing to advance or Withdraw the drill Without rotating the feed screw.

28. In a drilling apparatus, a friction feed operative during the rotation of the drill, and including a feed screw operated by said friction feed, a casing completely envelop-V ing said feed screw in all of its positions, a stationary rotatable feed sleeve, and means for rotating said sleeve in order to advance or Withdraw the drill Without rotating the feed screw and Without extending the same from its casing.

29. Inla drilling apparatus, a frame, a friction feed mounted thereon and operative during the rotation of the drill, and includingv a feed screwoperated by said friction feed, a drill socket carried by said frame and operatively connected With said friction feed, actuatin means for said socket, and means for ad]usting the drill to its Work Without moving the frame or rotating the feed screw.

CLARENCE B. GROFF. Witnesses:

C. D. MCVAY, J. C. MGGLASHEN.

Gopies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

